Plastering compound



I UNITED STATES PATENT OFFICE.

\VILLIAM M. DAIVSON, OF ST.- LOUIS, MISSOURI.

PLASTERING COMPOUND.

SPECIFICATION forming part of Letters Patent No. 464,116, dated December 1, 1891.

Application filed April 25, 1891. Serial No. 390,523. (No specimens.)

1'0 all whom it may concern.-

Be it known that 1, WILLIAM M. DAWSON, a citizen of the United States, residing in the city of St. Louis, in the State of Missouri, have made and invented a new and useful Improvement in Plastering Compounds, of which the following is a full, clear, and exact description. My invention relates particularly to the manufacture of a finishing-coat for use in the plastering of Walls, and has the quality of being more easily and satisfactorily worked than others at present in use, while at the same time it makes a much harder surface and resists to a greater degree dampness and heat than the materials now in common use.

Mycomposition is prepared in the following manner: I dissolve a sufficient quantity of glue in three quarts of boiling Water, after which I steep four pounds of linseed-meal in four quarts of heated water until the gluten and oil have been thoroughly extracted from the meal. This heated mass is then placed in a press and subjected to pressure. The oil This is then dried, after which it is reduced 7 to a fine powder. The powder is used with plaster-of-paris or other similar quick-setting material in the productiou of a mortar to make finishing-coats.

What I claim, and desire to secure by Letters Patent, is-

, e The above-described composition of matter,

composed of glue, linseed-meal, and chalk or 40 air-slaked lime, combined substantially as above set forth.

. WILLIAM M. DAWSON.

Witnesses:

W. E. FIssE, JOHN K. TIFFANY. 

